Population
Service age groups
About this topic
Service age groups divide the population into broad life-stage bands such as children, young adults, working-age adults, and older people. The groupings are designed to reflect typical demand for age-based services and facilities rather than exact five-year cohorts.
This view is useful for planning childcare, schools, recreation, aged services, and other community infrastructure. It works best alongside five year age groups, household type, and dwelling data, which add more detail about who is living in an area and how needs may change over time.
Interpretation notes
- This is a derived grouping rather than a direct Census question, so the age bands are planning-oriented summaries built from standard age data.
- Percentages relate to the total population; use five year age groups when exact cohort detail matters.
Related topics
Key insight
In 2021, Parents and homebuilders (35 to 49) was the most common category among residents in Gumma, accounting for 19.3% (94 people). This share was higher than Nambucca (A) (14.5%). Since 2016, the biggest change was in Seniors (70 to 84), which increased by 26 people and 4.7 percentage points.
Section overview
Age structure - Service age groups
Gumma - Total persons (Usual residence)
This table summarises service age groups for Gumma in 2021 for persons, with comparison against Nambucca (A) and change since 2016.
Age structure - Service age groups snapshot
2021 distribution by category for Gumma, with comparison markers for Nambucca (A).
Babies and pre-schoolers (0 to 4)
2021 count
20
% of total
4.1%
Change from 2016
-2.2pp
20
4.1%
-2.2pp
Primary schoolers (5 to 11)
2021 count
38
% of total
7.8%
Change from 2016
-2.7pp
38
7.8%
-2.7pp
Secondary schoolers (12 to 17)
2021 count
32
% of total
6.6%
Change from 2016
-1.5pp
32
6.6%
-1.5pp
Tertiary education and independence (18 to 24)
2021 count
25
% of total
5.1%
Change from 2016
-3.2pp
25
5.1%
-3.2pp
Young workforce (25 to 34)
2021 count
31
% of total
6.4%
Change from 2016
-1.2pp
31
6.4%
-1.2pp
Parents and homebuilders (35 to 49)
2021 count
94
% of total
19.3%
Change from 2016
+2.9pp
94
19.3%
+2.9pp
Older workers and pre-retirees (50 to 59)
2021 count
71
% of total
14.6%
Change from 2016
+0.6pp
71
14.6%
+0.6pp
Empty nesters and retirees (60 to 69)
2021 count
91
% of total
18.7%
Change from 2016
+1.0pp
91
18.7%
+1.0pp
Seniors (70 to 84)
2021 count
81
% of total
16.7%
Change from 2016
+4.7pp
81
16.7%
+4.7pp
Elderly aged (85 and over)
2021 count
11
% of total
2.3%
Change from 2016
+1.6pp
11
2.3%
+1.6pp
Chart view
Age structure - Service age groups change
Absolute change in category counts between 2016 and 2021.
Babies and pre-schoolers (0 to 4)
-9
-2.2pp
Primary schoolers (5 to 11)
-10
-2.7pp
Secondary schoolers (12 to 17)
-5
-1.5pp
Tertiary education and independence (18 to 24)
-13
-3.2pp
Young workforce (25 to 34)
-4
-1.2pp
Parents and homebuilders (35 to 49)
+19
+2.9pp
Older workers and pre-retirees (50 to 59)
+7
+0.6pp
Empty nesters and retirees (60 to 69)
+10
+1.0pp
Seniors (70 to 84)
+26
+4.7pp
Elderly aged (85 and over)
+8
+1.6pp
Data table
Service age groups for Gumma. Age structure - Service age groups. 2021 and 2016 counts, percentages, and change compared with Nambucca (A).
| Category | 2021 | 2016 | Change | |||||
|---|---|---|---|---|---|---|---|---|
| Count | % | Nambucca (A)% | Count | % | Nambucca (A)% | Count | pp | |
| Babies and pre-schoolers (0 to 4) | 20 | 4.1% | 4.8% | 29 | 6.3% | 4.8% | -9 | -2.2pp |
| Primary schoolers (5 to 11) | 38 | 7.8% | 7.2% | 48 | 10.5% | 8.1% | -10 | -2.7pp |
| Secondary schoolers (12 to 17) | 32 | 6.6% | 7.3% | 37 | 8.1% | 7.0% | -5 | -1.5pp |
| Tertiary education and independence (18 to 24) | 25 | 5.1% | 5.2% | 38 | 8.3% | 5.7% | -13 | -3.2pp |
| Young workforce (25 to 34) | 31 | 6.4% | 8.2% | 35 | 7.6% | 7.6% | -4 | -1.2pp |
| Parents and homebuilders (35 to 49) | 94 | 19.3% | 14.5% | 75 | 16.4% | 14.4% | +19 | +2.9pp |
| Older workers and pre-retirees (50 to 59) | 71 | 14.6% | 13.5% | 64 | 14.0% | 15.9% | +7 | +0.6pp |
| Empty nesters and retirees (60 to 69) | 91 | 18.7% | 18.2% | 81 | 17.7% | 17.4% | +10 | +1.0pp |
| Seniors (70 to 84) | 81 | 16.7% | 17.7% | 55 | 12.0% | 15.2% | +26 | +4.7pp |
| Elderly aged (85 and over) | 11 | 2.3% | 3.5% | 3 | 0.7% | 3.7% | +8 | +1.6pp |
| Total | 486 | 100.0% | 100.0% | 458 | 100.0% | 100.0% | +28 | 0.0pp |